i think its a case of why would marvel make that agreement when they already making big money with the characters they have got, its probably more beneficial to FOX isn't it?

and probably the most important aspect of this... if it turns out they are in the 70s... and avengers 2 is in present day... yeah... um...

Marvel would probably want to use more characters (FF, SS) eventually and Fox wants some of that Avenger money. I can easily see benefits for both companies.

If its in the 70s then I doubt the connection being Magneto's son will even be made. So I dont know. Fox hasnt been good with any of that stuff. Theres alot of questions with this film and since it deals with multiple timelines....I have no idea wtf is going on haha.